Political parties and tribals who have been agitating against bauxite mining are planning to block scientists of the Indian Council of Forest Research and Environment when they come for a survey. It is learnt that the scientists would visit the Agency areas soon to undertake a mining impact survey. This is mandatory to get permission for mining in a forest area from the ministry of environment and forests. The proposed mining project would displace tribals in large numbers and has also evoked sharp protests from environmentalists who warn that it would have a negative ecological impact.